We welcomed my husband’s sister, 20, to live with us for free. (She had recently started working and lives far away). We asked her to watch our 2-year-old twin boys on Saturday nights while we went out. She replied, “I have a life!You must pay me for my time: I declined, and she had no choice but to accept; things had been going well for months.

We returned one Sunday night to find her crying and the place completely chaotic. She stated that after putting the kids to bed, she went to sleep herself. She came down for a glass of water and saw that the house had been vandalized. This appeared unusual to us. Fortunately, we did not keep anything valuable at home. We barely had $400 in our room, and it was all gone.My spouse and I later reviewed our entrance cameras before calling the cops. We were horrified to discover that she had lied to us.

Her partner arrived shortly after we departed and stayed for several hours. Hethen left just a few minutes before we returned. She appeared calm and pleased, kissing him in front of the main door. This was confirmation that no one had broken in; it had always been just her and her partner. They planned to rob us simply because we refused to pay her.

My husband refuses to notify the cops because it’s his sister, but I don’t want her in my house or around my children ever again. She betrayed us after we welcomed her into our home. I don’t get it; did we do something wrong here?